<template>
  <!-- 主体部分 -->
  <section class="main">
    <!-- 全选反选按钮 -->
    <input v-model="isAll" id="toggle-all" class="toggle-all" type="checkbox" />
    <label for="toggle-all">Mark all as complete</label>
    <ul class="todo-list">
      <!-- 当任务已完成，可以给 li 加上 completed 类，会让元素加上删除线 -->
      <li v-for="item in list " :key="item.id" :class="{completed:item.flag}">
        <div class="view">
          <input :checked="item.flag" @change="handleChange($event,item.id)" class="toggle" type="checkbox"/>
          <label>{{item.name}}</label>
          <button @click="del(item.id)" class="destroy"></button>
        </div>
      </li>
    </ul>
  </section>
</template>

<script>
export default {
  props:{
    list:Array
  },
  methods:{
    del(id){
      this.$emit('del',id)
  },
  handleChange(e,id){
    this.$emit('changeState',e.target.checked,id)
  }
  },
  computed:{
    isAll:{
       get(){
        return this.list.every(item => item.flag ===true)
       },
       set(value){
        this.$emit('changeAll',value)
       }
    }
  }
  
}
</script>

<style></style>
